public class PartialApply extends Expression
EFFECTIVE_BOOLEAN_VALUE, EVALUATE_METHOD, EVENT_FEED_METHOD, INHERITED_CONTEXT, INSPECTION_CONTEXT, ITEM_FEED_METHOD, ITERATE_METHOD, locationId, MAX_SEQUENCE_LENGTH, MAX_STRING_LENGTH, NAVIGATION_CONTEXT, NODE_VALUE_CONTEXT, PROCESS_METHOD, PUSH_SELECTION, staticProperties, UNBOUNDED_LOWER, UNBOUNDED_UPPER, W3C_CONSUMING, W3C_FREE_RANGING, W3C_GROUP_CONSUMING, W3C_MOTIONLESS, WATCH_METHOD| Constructor and Description |
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PartialApply(Expression base,
Expression[] boundArguments)
Create a partial function application expression
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| Modifier and Type | Method and Description |
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protected int |
computeCardinality()
Compute the static cardinality of this expression
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Expression |
copy()
Copy an expression.
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FunctionItem |
evaluateItem(XPathContext context)
Evaluate this experssion at run-time
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void |
explain(ExpressionPresenter out)
Diagnostic print of expression structure.
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Expression |
getBaseExpression() |
Expression[] |
getBoundArguments() |
ExpressionCompiler |
getExpressionCompiler()
Return the compiler of the PartialApply expression
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ItemType |
getItemType(TypeHierarchy th)
Determine the data type of the expression, if possible.
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Iterator<Expression> |
iterateSubExpressions()
Get the immediate sub-expressions of this expression.
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Expression |
promote(PromotionOffer offer,
Expression parent)
Offer promotion for this subexpression.
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boolean |
replaceSubExpression(Expression original,
Expression replacement)
Replace one subexpression by a replacement subexpression
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Expression |
simplify(ExpressionVisitor visitor)
Simplify an expression.
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String |
toString()
The toString() method for an expression attempts to give a representation of the expression
in an XPath-like form.
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Expression |
typeCheck(ExpressionVisitor visitor,
ExpressionVisitor.ContextItemType contextItemType)
Perform type checking of an expression and its subexpressions.
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addToPathMap, adoptChildExpression, checkForUpdatingSubexpressions, checkPermittedContents, computeDependencies, computeSpecialProperties, computeStaticProperties, doPromotion, dynamicError, effectiveBooleanValue, evaluateAsString, evaluatePendingUpdates, explain, getCardinality, getColumnNumber, getColumnNumber, getConstructType, getContainer, getDependencies, getEvaluationMethod, getExecutable, getExpressionName, getHostLanguage, getImplementationMethod, getIntegerBounds, getIntrinsicDependencies, getLineNumber, getLineNumber, getLocationId, getLocationProvider, getObjectName, getProperties, getProperty, getPublicId, getSlotsUsed, getSpecialProperties, getStreamability, getStreamingAdjunct, getSystemId, getSystemId, hasVariableBinding, implementsStaticTypeCheck, isSubtreeExpression, isUpdatingExpression, isVacuousExpression, iterate, iterateEvents, iterateSubExpressionInfo, markTailFunctionCalls, optimize, process, resetLocalStaticProperties, setContainer, setEvaluationMethod, setFiltered, setFlattened, setLocationId, staticTypeCheck, suppressValidation, toPattern, toStreamingPattern, typeErrorpublic PartialApply(Expression base, Expression[] boundArguments)
base - the expression that returns the function to be calledboundArguments - an array in which each element is either an expression to be bound to the corresponding
argument, or null to represent a placeholder ("?" in the source syntax)public Expression getBaseExpression()
public Expression[] getBoundArguments()
public Expression typeCheck(ExpressionVisitor visitor, ExpressionVisitor.ContextItemType contextItemType) throws XPathException
ExpressionThis checks statically that the operands of the expression have the correct type; if necessary it generates code to do run-time type checking or type conversion. A static type error is reported only if execution cannot possibly succeed, that is, if a run-time type error is inevitable. The call may return a modified form of the expression.
This method is called after all references to functions and variables have been resolved to the declaration of the function or variable. However, the types of such functions and variables may not be accurately known if they have not been explicitly declared.
If the implementation returns a value other than "this", then it is required to ensure that the location information in the returned expression have been set up correctly. It should not rely on the caller to do this, although for historical reasons many callers do so.
typeCheck in class Expressionvisitor - an expression visitorcontextItemType - the static type of "." at the point where this expression is invoked.
The parameter is set to null if it is known statically that the context item will be undefined.
If the type of the context item is not known statically, the argument is set to
Type.ITEM_TYPEXPathException - if an error is discovered during this phase
(typically a type error)public Expression simplify(ExpressionVisitor visitor) throws XPathException
Expressionsimplify in class Expressionvisitor - an expression visitorXPathException - if an error is discovered during expression
rewritingpublic ItemType getItemType(TypeHierarchy th)
ExpressionThis method should always return a result, though it may be the best approximation that is available at the time.
getItemType in class Expressionth - the type hierarchy cachepublic Iterator<Expression> iterateSubExpressions()
ExpressioniterateSubExpressions in class Expressionpublic Expression promote(PromotionOffer offer, Expression parent) throws XPathException
ExpressionThis method must be overridden for any Expression that has subexpressions.
promote in class Expressionoffer - details of the offer, for example the offer to move
expressions that don't depend on the context to an outer level in
the containing expressionparent - the containing expression in the expression treeXPathException - if any error is detectedpublic boolean replaceSubExpression(Expression original, Expression replacement)
ExpressionreplaceSubExpression in class Expressionoriginal - the original subexpressionreplacement - the replacement subexpressionpublic void explain(ExpressionPresenter out)
Expressionexplain in class Expressionout - the expression presenter used to display the structureprotected int computeCardinality()
ExpressioncomputeCardinality in class ExpressionStaticProperty.ALLOWS_ZERO_OR_ONE,
StaticProperty.EXACTLY_ONE, StaticProperty.ALLOWS_ONE_OR_MORE,
StaticProperty.ALLOWS_ZERO_OR_MOREpublic Expression copy()
Expressioncopy in class Expressionpublic String toString()
The toString() method for an expression attempts to give a representation of the expression in an XPath-like form.
For subclasses of Expression that represent XPath expressions, the result should always be a string that parses as an XPath 3.0 expression. The expression produced should be equivalent to the original making certain assumptions about the static context. In general the expansion will make no assumptions about namespace bindings, except that (a) the prefix "xs" is used to refer to the XML Schema namespace, and (b) the default funcion namespace is assumed to be the "fn" namespace.
In the case of XSLT instructions and XQuery expressions, the toString() method gives an abstracted view of the syntax that is not designed in general to be parseable.
toString in class Expressionpublic FunctionItem evaluateItem(XPathContext context) throws XPathException
evaluateItem in class Expressioncontext - The XPath dynamic evaluation contextXPathException - if a dynamic error occurs during evaluation of the function.public ExpressionCompiler getExpressionCompiler()
getExpressionCompiler in class ExpressionCopyright (c) 2004-2013 Saxonica Limited. All rights reserved.